NEW EDITION

Yes, MassMailer supports a single email to any standard or a custom object including lead or contact. You can select the specific contact or lead. Select 'Send via MassMailer' button/action which takes you to the MassMailer Outreach Wizard to send an email.




OLD EDITION

Yes, MassMailer supports a one-off email to any lead or contact. You can select the specific contact or lead. In the 'Activity History' section you will see a button called 'Schedule via MassMailer'. Click on that button to send a single email.